Valve-lifting device



Patented June 21, 1927.

lUNI''ED STATES 1,632,834 PAirEN orales.

WHITNEY E.' GREENE AND ALTON E. MORONG, 0F BROKLINE, MASSACHUSETTS.

VALVE-LIFTING DEVICE.

Application filed.v June 17,

rfhis invention relates to-hydraulic devices for lifting valves, andparticularly to devices of this nature adapted to raise the pluralityofvalve springs to permit the grinding of valve seats or the removal ofthe poppet valves of an automobile, or other internal combustion engine.The object of the invention is to provide simple and edective means forquickly and easily lifting such valves springs for this purpose.

`In ordinary practice it is customary to raise. a single valve springata time by a lever or other mechanically operated device, in order thatthe pins attaching the spring to l5 the valve stem may be removed andthe valve and stem extracted'for cleaning and grinding. This operationistime consuming and often difficult because of the extreme tension Iofthe valve springs. The utilization of a device constructed in accordancewith my invention overcomes these objections, since a number of springsmay be raised simultaneously and with but slight manual effort. Apreferred embodiment of the invention as applied in use is illustratedin the accompanying drawings, in which:

Fig. 1 is a side elevation of the improved device in inoperativeposition.

Fig. 2 is a sectional view on the line 2 2 of Fig. 1.

Fig. 3 is a. longitudinal section on the line 3-3 of Fig. 2; and

Fig. 4 is a detail view partly in sect-ion showing a portion of thelifting device in operated position. l

The lifting device comprisesessentially a metal plate having openings toreceive a plurality of valve stems adapted to engage the spring seats ofsaid valvestems a piston deadjacent openings, a base member having acylinder for said piston, and means communicating with the cylinderadapted to elevate the piston by hydraulic pressure,` whereby the valvespring will be raised to permit the removal of the retaining pin and theeX- traction of the valve.

The construction of the poppet valves of an automobile of the L-headtype are well understood, as represented in a conventional manner in thedra-wings. A valve spring chamber having a top Wall 5 and a bottom wall6 contains the elements of the valve mechanism concerning which thisinvention has application, and permits access to such mechanism. Valvestems 7 which pass pending therefrom intermediate one pair ot 1926.Serial No. 116,644.

through openings in the upper wall 5, kare surrounded by springs 8 lyingbetween the top wall 5 and spring seats 9, said seats engagingremoveable pins 10 iny the stems. In order-'to remove the valve stems togrind the valves it is necessary to raise the springs 8, so that thepins 10 may be removed..

As a means of easily and conveniently accon'iplishing this result, thereis provided a plate 11 having spaced recesses 12 and a. downwardlyprojecting piston llccated between the central pair of recesses. Y Therecesses 12 are cutfrom the inner'longitudinal edge of the plate 11 andenough to permit the pin 10 to pass freely therethrough yet sufiiciently'narrow to engage the spring seats 9 when the plate isinserted beneathrsaid seats. I

Piston 13 is slidable in a vertical cylinder 14- of a base member 15upon which the plate 11 normally rests (Fig. 2) and cylinder 14communicates through a lateral passa-ge 16 with an attachment member17-member 17 is preferably provided with the customary ball valve 18 andserves as a connecting fitting for the hose 19 of a pressure gun, orother source of hydraulic pressure, as by the bayonet joint shown inFig. 4.

The `outer longitudinal edge of the plate 11 may be provi-ded with anupstanding flange 2O adapted to contact with the spring seat 9 to limitthe distance of insertion of plate 11 to the proper extent, so that theinner edge of the recesses12 will escape pins 10 when plate 11 iselevated.

' When applied for operation the base members 15 rest upon the bottomwall 6 between the central pair of valve stems, plate 11 rests upon thetop surface of the base member and the valve stems 7 are disposed withinthe corresponding recesses 12, the vertical dimensions of the devicebeing such that the top surface of plate 11 lies beneath the valve seats9, a slightclearance space 21 intervening. A source of hydraulicpressure, such as a grease or oil gun, is then connected to member 17,and upon the application of such pressure oil or grease is communicatedthrough passage 16 to cylinder 14, thus lifting piston 13 and plate 11and depressing the valve springs against top wall 5. The pins 1() may bereadilyremoved and the valve extracted.

1f it is desired to remove the pressure, yet hold the springs in raisedposition, ablock 23 (Fig. 1) may be inserted between plate mal position.

A valve littmg device constructed as above described isV highlyeiiicient in operation,`

economical of construction and extremely durable, since the parts may befashioned or Vstrong and rigid metals and since there are no removableelements which are likely to Wear out or become damaged in use. Itshould be understood, however, that this in vention is not to be limitedto the exact construction shown, tor various modifications may beincluded Within the scope of t-he inl vention as deiined in thefollowing claims.

Ve claim; y t

1. A device for simultaneously compressing aplurality of valve springscomprising alitting plate adapted to engage the under sides of aplurality of valve spring seats, said plate having openings to receivethe valve stems, a base member normally supporting said plate, said basememlier having a chamber and said plate carryinga depending pistonmoveable in said chamber, and means associated with the base Vmember toadmit hydraulic pressure to said chamber, thereby to elevate the plateand compress the valve springs;

' 2. A device Yfor simultaneously compressing a plurality of valvesprings comprising a lifting plate adapted to lengage the under sidesot' arplurality of valve spring seats, said plate having openings toreceive valve stems a base member normally supporting said plate andhaving an u'pturned flange at its outer edge to limit inward movementthereof, a piston dependingT from the plate, a cylinder' in the basemember receiving said piston, and means associated with the base memberto admit hydraulic pressure to rsaid cylinder, thereby to elevate theplate and compress the valve springs.

In testimony whereof We alix our signa tures. l ,i

WHITNEY E. GREENE. ALToN E. MoRoNG.

